A girl named Jessica in all her infinite maturity went a screwed it up.

And she went and screwed it up with a guy. Can you believe her? Can you believe how I put what I just said?

The guy's name? The Duke. The Duke Leto Atreides, to be specific. The Duke is a pretty much good guy, sometimes he'll get a temper, but generally, he's quite the optimist.

The Lady Jessica and the Duke Leto Atreides gave birth to Paul Atreides, simultaneously giving birth to the Kwisatz Haderach. 100 years too early.

Also, something quick about Paul, he's the main character of this book, and his most popular name is not Paul, nor the Kwisatz Haderach. In fact, it is the Maud Dib, the Fremen interpretation of the Kwisatz Haderach...sort of.